GlenDoku.com
GlenDoku.com
Free online sudoku puzzles with cute pets — no download. One pet per row, column and color block, no two touch. Levels from 5×5 to 9×9, logic only.
Sudoku puzzles come in many shapes, and GlenDoku is one of them: instead of filling a grid with numbers, you place one animal per row, per column and per colored region, and no two animals may touch — not even diagonally. These free online sudoku puzzles keep the pure logic of the classics while adding a no-touching rule that changes every deduction.
If you enjoy sudoku puzzles that reward reasoning instead of guessing, try these animal sudoku puzzles: every level is solvable step by step, wrong placements cost one of your 3 hearts, and the board grows from 5×5 up to 9×9. No download, no sign-up — just logic puzzle rules you can learn in one tutorial.
These sudoku puzzles with animals fit perfectly into short breaks: a level takes a few minutes, needs no numbers and no arithmetic, and works the same on phone and desktop. Because the board is visual, it also suits kids who are practising observation and reasoning, and players who simply do not enjoy calculating.
Compared with number-based sudoku puzzles, GlenDoku replaces digits with animals and adds the no-touching rule, so a placement rules out the eight cells around it at once. Levels start at 5×5 so the rules are easy to learn, mistakes cost only one of 3 hearts, and progress is saved locally if you want to continue later.
Tap or swipe a cell to mark it with ✕. Double-tap to place a pet.
Rules:
A wrong placement costs 1 of your 3 hearts — every level starts with 3 fresh hearts. Clear a level by finding every pet — the board grows from 5×5 up to 9×9.
Levels are endless and the grid grows with you: levels 1–10 climb from 5×5 up to 9×9, levels 11–20 run the same climb again, and from level 21 the board stays at 9×9 in endless mode with a fresh puzzle every time. Every level starts with 3 hearts that refill when you clear it; in endless mode boosters refill more slowly (+1 every 2 levels from level 31, every 3 levels from level 41). Levels 1–10 unlock one animal for free at the start; from level 11 you deduce every placement yourself. A new animal joins every 10 levels, and progress is saved on your device.
Tap to mark ✕, double-tap to place a pet. Find every pet to clear the level.
No. GlenDoku runs in your browser, and progress is saved on your device.
Yes — each level starts with 3 hearts. Peek and hint boosters refill by 1 every level, up to a maximum of 3.
Endless; boards grow from 5×5 to 9×9.
GlenDoku is a free browser puzzle game that mixes classic sudoku logic with cute animals: rows, columns, colored regions and a no-touching rule. It works on phone and desktop, needs no download and no account, and your progress and best score are stored locally on your device.
Have fun finding a home for every pet!
3 hearts per level · 1 lost per mistake · boosters +1 per level (max 3)